Trouble in Hydraulic Relief Valve
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Now we study about "Hydraulic Relief Valve"2) Fault :- Low pressure or no pressure.
Probable causes and Remidial action.
1. Valve improperly adjusted.
=> Adjust valve by adjusting knob to proper pressure setting.
2. Vent connection is open (at the time of starting the work, if vent remain open, then oil will go to the tank and no pressure will develop).
=> Plug the vent connection.
3. Balance hole in main piston choked.
=> Remove piston and clean the orifice. Clean the tank and replace hydraulic oil.
4. Poppet in cover not seating. (So, oil will continuously go to tank line and pressure will drop).
=> Check the poppet condition. If required, replace it.
5. Broken or weak spring (oil will push the poppet easily and go to tank. So pressure will drop).
=> Replace the spring and again set the pressure with adjusting knob.
6 . Dirt, chip etc keeps
valve partially open.
>> Clean the complete valve.
Now we study about "Hydraulic Relief Valve"
2) Fault :- Low pressure or no pressure.
Probable causes and Remidial action.
1. Valve improperly adjusted.
=> Adjust valve by adjusting knob to proper pressure setting.
2. Vent connection is open (at the time of starting the work, if vent remain open, then oil will go to the tank and no pressure will develop).
=> Plug the vent connection.
3. Balance hole in main piston choked.
=> Remove piston and clean the orifice. Clean the tank and replace hydraulic oil.
4. Poppet in cover not seating. (So, oil will continuously go to tank line and pressure will drop).
=> Check the poppet condition. If required, replace it.
5. Broken or weak spring (oil will push the poppet easily and go to tank. So pressure will drop).
=> Replace the spring and again set the pressure with adjusting knob.
6 . Dirt, chip etc keeps
valve partially open.
>> Clean the complete valve.
=> Adjust valve by adjusting knob to proper pressure setting.
2. Vent connection is open (at the time of starting the work, if vent remain open, then oil will go to the tank and no pressure will develop).
=> Plug the vent connection.
3. Balance hole in main piston choked.
=> Remove piston and clean the orifice. Clean the tank and replace hydraulic oil.
4. Poppet in cover not seating. (So, oil will continuously go to tank line and pressure will drop).
=> Check the poppet condition. If required, replace it.
5. Broken or weak spring (oil will push the poppet easily and go to tank. So pressure will drop).
=> Replace the spring and again set the pressure with adjusting knob.
6 . Dirt, chip etc keeps
valve partially open.
>> Clean the complete valve.
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